The first teaser for ‘Knock Knock’ was released on Friday by director Eli Roth on his official FaceBook. The film stars Keanu Reeves as a father who gets more than he bargained for when he allows two attractive young women into his house while his family is away. The film is a moderization of the 1977 ‘Death Game’ by Peter Traynor. Lorenza Izzo, Ana de Armas, Aaron Burns, Ignacia Allamand and Colleen Camp also star at the film which premiered at Sundance on Friday. You can view the teaser below.